cycloidal

cycloid

top: surface view of cycloid scales of a bony fish

bottom: The parametric equations of this cycloid are

x = r(θ - sin θ),

y = r(1 - cos θ).

cycloid

cy·cloid

 (sī′kloid′)

adj.

1. Resembling a circle.

2. Zoology

a. Relating to or being a kind of fish scale that is thin, rounded, and smooth-edged and often shows concentric growth rings.

b. Having cycloid scales.

3. Psychology Afflicted with or relating to cyclothymia.

n. Mathematics

The curve traced by a point on the circumference of a circle that rolls on a straight line.

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[French cycloïde, from Greek kukloeidēs, circular : kuklos, circle; see k^wel- in Indo-European roots + -oeidēs, -oid.]

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cy·cloi′dal (-kloid′l) adj.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Thesaurus

Adj.

1.

cycloidal - resembling a circle cycloid rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"

Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.